Temat: activated carbon - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Removal of reactive yellow dye 145 from wastewaters over activated carbon that is derived from Iraqi kehdrawy date palm seeds
Autorzy:: Esmael, Hussein A.
Lafta, Abbas J.
Nema, Noor A.
Kahdum, Salih H.
Mousa, Abdulazeez A.
Abdali, O. Karar
Powiązania:: https://bibliotekanauki.pl/articles/1193943.pdf
Data publikacji:: 2015
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Activated carbon
Activated charcoal
Adsorption over activated carbon
Textile dyes
activated carbon
date palm seeds
linear Freundlich
linear Langmuir
Opis:: This work involves synthesis of activated carbon from Iraqi date palm seeds as agricultural wastes using kehdrawy palm seeds. The preparation was conducted by chemical activation method using ZnCl2 as an activator. The synthesized activated carbon (AC) was characterized by different analytical and spectroscopic methods. This involves using scanning electron microscopy (SEM), flourier transformation infrared (FTIR), ash content, adsorption capacity, the percentage of humidity and the point zero charge (PZC). The activity of the prepared activated carbon was investigated by following the removal of reactive yellow 145 dye (RY 145) from the aqueous solutions. For a comparison a sample of non- activated carbon (NAC) was used in the same process. From the obtained results it was found that AC was more efficient in dye removal in comparison with NAC under the same conditions
Źródło:: World Scientific News; 2015, 21; 77-89
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Impact of preparation and storage of activated carbon on the high pressure sorption of CO2
Autorzy:: Lutyński, M.
Powiązania:: https://bibliotekanauki.pl/articles/200536.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: activated carbon
sorption
carbon dioxide
Opis:: Adsorption of carbon dioxide on activated carbons has become extremely interesting in the field of energy and environment. Activated carbon is either used as a model to understand sorption processes on coals as a part of research on CO2 geological storage/Enhanced Coalbed Methane or as an adsorbent for processes such as natural gas treatment or CO2 separation from flue gas. The paper presents results of high-pressure CO2 sorption at the temperature of 318K on two similar activated carbons (Filtrasorb 400 and WAZ 0.6-2.4 mm) where one sample of WAZ was not subjected to any pretreatment procedure. Experimental results were fitted with three parameter Langmuir and therefore it was possible to calculate CO2 adsorbed phase densities. The WAZ activated carbon has a slightly lower sorption even though it was pretreated with the same procedure. The untreated sample of WAZ exhibited sorption which was lower over 15%. Calculated adsorbed phase densities differ between the activated carbons and the lowest value was obtained for the untreated WAZ sample (21.0 mol/dm3).
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 1; 113-119
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Adsorption of Naproxen Sodium from Aqueous Solutions on Commercial Activated Carbons
Autorzy:: Lach, Joanna
Szymonik, Anna
Powiązania:: https://bibliotekanauki.pl/articles/123683.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: naproxen sodium
activated carbon
adsorption
Opis:: The pollution of surface and drinking water with pharmaceuticals is one of the growing problems. One of the groups used in large quantities involves nonsteroidal anti-inflammatory drugs which can be bought without a prescription. This group includes naproxen, which was identified in wastewater, surface water and even drinking water all over the world. The aim of the study was to assess the opportunities for the removal of naproxen sodium from water using carbon sorbents. The measurements were carried out for three commercial microporous (WG-12 and F-300) and micro-mesoporous (ROW 08 Supra) activated carbons. The kinetics and statics of adsorption were studied. The adsorption from solutions with pH from 6 to 10 and temperature from 20°C to 40°C was analysed. It was found that the higher the pH, the lower the adsorption and the higher the temperature, the greater the adsorption of naproxen sodium. The highest adsorption of naproxen sodium was obtained for the F-300 activated carbon, whereas the lowest – for the ROW 08 Supra activated carbon. It was found that the adsorption results depend on many factors, the most important of which include hydrogen bonds between carboxyl groups of naproxen sodium and phenolic groups on the surface of activated carbons and electrostatic repulsion between the anions of naproxen sodium and negatively charged the surface of the activated carbon. The results of adsorption kinetics were described with the following models: pseudo-first order and pseudo-second order, intraparticle diffusion, and Elovich. The highest values of correlation coefficient R² were obtained for the pseudo-second order and Elovich model. The results of adsorption statics were described using the Freundlich, Langmuir, and Temkin models. A good match between isotherms and the obtained results was obtained for the Freundlich and Temkin equations. It was found based on the adsorption intensity 1/n and distribution coefficient R_L that this process was beneficial for all the considered activated carbons and the investigated adsorption conditions.
Źródło:: Journal of Ecological Engineering; 2019, 20, 10; 241-251
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Application of Powdery Activated Carbons for Removal Ibuprofen from Water
Autorzy:: Puszkarewicz, A.
Kaleta, J.
Papciak, D.
Powiązania:: https://bibliotekanauki.pl/articles/124366.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ibuprofen
adsorption
powdery activated carbon
Opis:: The paper presents the results of studies on the use of adsorptive properties of selected powdered activated carbons (Norit SA Super and Carbopol MB5) for removal of ibuprofen from water. The tests were performed on non-flow conditions, series depending on the type and dose of powdered adsorbents. The research was carried out on a model solution of ibuprofen at initial concentration C0 = 20 mg/dm³, at 20 °C. Froundlich and Langmuir adsorption isotherms were used. Lagergrene kinetic models (PFO) and Ho (PSO) were used to describe adsorption kinetics. Both carbons exhibited a higher affinity for the adsorbent at pH above 7. Norit SA Super was a better adsorbent, for which, the highest adsorption capacity q = 0.448 g/g was achieved with dose D = 35 mg/dm³. The effectiveness of adsorption (decrease of ibuprofen in water) was 78%. The total removal of ibuprofen was obtained for a dose of carbon D = 200 mg/ dm³. With respect to Carbopol, the highest adsorption capacity (q = 0.353 g/g) was achieved at a dose of 30 mg/dm³, resulting in a 53% efficiency. Studies have shown that both tested powdered activated carbons have contributed to effective cleaning of aqueous solutions containing ibuprofen.
Źródło:: Journal of Ecological Engineering; 2017, 18, 4; 169-177
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Adsorption Kinetics of Edamame Soybean Peel Activated Carbon in Reducing the Level of Phosphate
Autorzy:: Eri, Iva Rustanti
Pramudinta, Namira Kholifatul
Nurmayanti, Demes
Powiązania:: https://bibliotekanauki.pl/articles/2027815.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: adsorption kinetics
activated carbon
phosphate
Opis:: Domestic wastewater, such as detergent wastewater, causes the increase of the phosphate level that strongly contributes to eutrophication. Adsorption is a method that can be used to reduce the levels of phosphate. The natural ingredients that can be made as activated carbon include edamame soybean peel, because it contains a lot of celluloses. This research aimed to analyze the adsorption kinetics and adsorption capacity of edamame soybean peel activated carbon in reducing the phosphate levels. Adsorption was carried out with batch method with various concentrations of adsorbate (2 mg/L, 4 mg/L, and 6 mg/L) and stirring time (3 hours, 6 hours, 9 hours, and 12 hours). The results showed that the highest adsorption capacity was found in 6 mg/L of adsorbate concentration and 6 hours of stirring time. The results were validated by the Langmuir isotherm and pseudo-second-order adsorption kinetics model. The Langmuir isotherm indicated that adsorption occurred in monolayer. The maximum adsorption capacity was 0.43509 mg/g and the constant of adsorption kinetics was 1.5558 g/mg•min. Activated carbon from edamame soybean peel successfully reduced the levels of phosphate. The increase of adsorption capacity was correlated with the increasing concentration of adsorbate and stirring time until the equilibrium.
Źródło:: Journal of Ecological Engineering; 2022, 23, 2; 97-107
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Utilization of spent dregs for the production of activated carbon for CO2 adsorption
Autorzy:: Serafin, J.
Powiązania:: https://bibliotekanauki.pl/articles/779998.pdf
Data publikacji:: 2017
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: activated carbon
biomass
CO2 adsorption
Opis:: The objective of this work was preparation of activated carbon from spent dregs for carbon dioxide adsorption. A saturated solution of KOH was used as an activating agent. Samples were carbonized in the furnace at the temperature of 550°C. Textural properties of activated carbons were obtained based on the adsorption-desorption isotherms of nitrogen at −196°C and carbon dioxide at 0°C. The specific surface areas of activated carbons were calculated by the Brunauer – Emmett – Teller equation. The volumes of micropores were obtained by density functional theory method. The highest CO₂ adsorption was 9.54 mmol/cm³ at 0°C – and 8.50 mmol/cm³ at 25°C.
Źródło:: Polish Journal of Chemical Technology; 2017, 19, 2; 44-50
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Removal of Cadmium using Alkaline-Treated Activated Carbon from Leucaena Leucocephala Biomass
Autorzy:: Ibrahim, W. M. H. W.
Sulaiman, Nurul Syuhada
Amini, Mohd Hazim Mohammad
Kadir, W. R. A.
Mohamed, Mazlan
Ramle, Sitti Fatimah Mhd
Bilgin, Ugur
Rahman, Wan
Powiązania:: https://bibliotekanauki.pl/articles/2125550.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: activated carbon
cadmium
Leucaena leucocephala
adsorption
Opis:: Water contamination that caused by heavy metals is a very common phenomenon in the industrial age. One of the popular way to treat metal contaminated water is by adsorption process using activated carbon as the adsorbent. This paper works on producing activated carbon by chemical means with impregnation ratios of NaOH:char (w/w) was predetermined at 1:1 (ACT1-1), 2:1 (ACT2-1) and 3:1 (ACT3-1) under activation temperature of 700°C. Considering the Leucaena leucocephala is a wildly, easy and fast grown species, with the availability throught the year, it was chosen to be used as the precursor. The properties of these activated carbons and its potential for cadmium removal from aqueus solution was analyzed. It was found that the highest surface area was recorded at 662.76 m²/g. Four parameters were studied which are contact time, the effect of pH, initial concentration of adsorbate and temperature. The equilibrium time was achieved in 40 min treatment at initial concentrations of 30 mg/l. The adsorbent exhibited good sorption potential for cadmium at pH 8.0 and equilibrium temperature of 30℃. Based on the results, this study had proved that activated carbon from Leucaena leucocephala biomass have the good potential to be used for removal of cadmium from wastewater.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 3; 1033--1036
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Reduction of Ammonia Nitrogen and Chemical Oxygen Demand of Fertilizer Industry Liquid Waste by Coconut Shell Activated Carbon in Batch and Continuous Systems
Autorzy:: Budianto, Agus
Pratiwi, Adelia Gita
Ningsih, Sapta Ayu
Kusdarini, Esthi
Powiązania:: https://bibliotekanauki.pl/articles/27323843.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: activated carbon
waste
fertilizer
coconut shell
Opis:: The fertilizer industry laboratory produces urea and ammonia nitrogen waste that can harm living things in the surrounding water bodies. Urea, nitrogen, and ammonia can be reduced by adsorption using activated carbon. This research reduced urea nitrogen and ammonia through activated carbon adsorption with a batch and continuous system. Percentage indicator of urea and ammonia nitrogen removal through Ammonia Nitrogen (NH3-N) and Chemical Oxygen Demand (COD) NH3-N and COD analysis was determined. This study aimed to obtain: 1) the percentage of NH3-N and COD reduction in stem batch; 2) the percentage of NH3-N and COD reduction in the continuous system; 3) the Freundlich and Langmuir isotherm adsorption equation against NH3-N wastewater. They are testing the adsorption power of activated carbon in a batch system using variable levels of activated carbon: 40 g/L, 55 g/L, 70 g/L, 85 g/L, and 100 g/L and testing the adsorption power of activated carbon in a continuous system using the variable frequency of wastewater in contact with activated carbon filter cartridges, namely 2, 3, 4, 5, and 6 times. The results showed: 1) in the batch system NH3-N reduction of 98.26–98.82% and COD reduction of 92.53–97.05%; 2) in continuous system reduction of NH3-N of 86.05–88.07% and COD reduction of 93.91–97.05%; 3) Freundlich isotherm adsorption equation yields constant R2 0.9464, n 0.4482, KF 0.0616 mg/g; while Langmuir’s isotherm adsorption equation yields constant R2 0.8684, b -0.1046 L/mg, and qm 7.9872 mg/g.
Źródło:: Journal of Ecological Engineering; 2023, 24, 7; 156--164
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Zmiany właściwości węgli aktywnych po procesie ich modyfikacji
Changes in the properties of activated carbons on the process of modification
Autorzy:: Okoniewska, E.
Powiązania:: https://bibliotekanauki.pl/articles/125766.pdf
Data publikacji:: 2014
Wydawca:: Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:: węgiel aktywny
modyfikacja
activated carbon
modification
Opis:: Techniczne węgle aktywne WG-12, ROW 08 Supra i F-300 poddano modyfikacji za pomocą pola ultradźwiękowego. Pierwszy z nich to węgiel WG-12 produkowany przez firmę Gryfskand z Hajnówki. ROW 08 Supra to granulowany i uszlachetniony węgiel aktywowany, który można regenerować termicznie. Produkowany jest z torfu przez holenderską firmę Norit metodą parowo-gazową. Charakteryzuje się dużą objętością porów i znacznym rozmiarem ziaren, co sprawia, że jest powszechnie stosowany do uzdatniania wody pitnej w celu polepszania smaku wody oraz usuwania zapachu, ozonu, chloru i mikrozanieczyszczeń (np. rozpuszczonych substancji organicznych czy pestycydów). Węgiel F-300 to węgiel ziarnowy produkowany przez belgijską firmę Chemviron Carbon. Badano węgle aktywne specjalnie modyfikowane za pomocą roztworu KMnO4. Ze względu na redukcyjny charakter powierzchni węglowej Mn7+, pochodzący z roztworu KMnO4, redukuje się do Mn4+, tworząc na jego powierzchni nierozpuszczalny MnO2. Zmodyfikowany w ten sposób węgiel aktywny może być stosowany do usuwania z wody manganu w niepożądanych ilościach. Celem pracy było wykonanie analiz wybranych wskaźników technicznych, takich jak gęstość nasypowa, liczba jodowa, liczba metylenowa i zawartość popiołu zgodnie z PN.
Technical activated carbons WG-12, ROW 08 Supra and F-300 were modified using ultrasonic field. The first is carbon WG-12 produced by block bags from Hajnowka. ROW 08 Supra is refined granulated activated carbon, which can be regenerated thermally, is produced of peat by the Dutch company NORIT by steam and gas. Characterized by high pore volume and a large grain size, which makes it widely used for drinking water treatment in order to improve the taste of water and removal of odor, ozone, chlorine and micropollutants (for example, organic solutes or pesticides). Coal F-300 is a carbon particle size distribution produced by the Belgian company Chemviron Carbon. Test specially modified activated carbon with a solution of KMnO4. Due to the reducing nature of the surface of the carbon derived from Mn7+ KMnO4 solution reduces to Mn4+ form on the surface of insoluble MnO2. This modified activated carbon can be used for removing manganese from water in undesirable amounts. The aim of this study was to perform analyzes of selected technical indicators, such as bulk density, iodine value, the number of methylene and ash content in accordance with Polish standards.
Źródło:: Proceedings of ECOpole; 2014, 8, 1; 250-254
1898-617X
2084-4557
Pojawia się w:: Proceedings of ECOpole
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Effectiveness of Carbon Monoxide Concentration Reduction on Active Carbon Contact System in Burning Polystyrene Foam
Autorzy:: Fikri, E.
Veronica, A.
Powiązania:: https://bibliotekanauki.pl/articles/123480.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: polystyrene foam
particle size
activated carbon
carbon monoxide
Opis:: One of the wastes generated by PT Beton Elemenindo Perkasa is polystyrene foam waste. Processing of this type of waste is still done with open burning so it has an impact on health and the environmental quality degradation. One of the polystyrene foam waste processing technologies is by constructing a combustion furnace equipped with carbon filter. Activated carbon is one of the air filter media that can absorb harmful gases from the combustion process. The purpose of this research is to identify the effectiveness of carbon monoxide (CO) concentration reduction on active carbon contact system using variation of particle size. This research is a kind of an experimental study involving post test with control design. The number of samples was calculated based on the number of treatments and the number of repetitions in the study. This research used 2 kinds of treatment, including 20 mesh and 30 mesh in 9 repetitions. Independent T-Test statistical analysis showed a significant difference (p-value = 0.001) between the variation of particle size of activated carbon and the CO parameters with the average of the most effective reduction percentage on particle-sized active carbon of 30 mesh was 77.95%.
Źródło:: Journal of Ecological Engineering; 2018, 19, 4; 1-6
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Operating Parameters Effect on Adsorptive Desulphurisation Process of Diesel Oil
Autorzy:: Kalam, M. F.
Schütz, W.
Powiązania:: https://bibliotekanauki.pl/articles/342386.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
Tematy:: desulphurisation
diesel oil
adsorption
activated carbon (AC)
Opis:: The vision of this research was to investigate the removal of thiophene sulphur compounds from high sulphur content (1.3%) diesel oil by adsorptive desulphurisation process using powdered activated carbon. The adsorptive desulphurisation process was performed under three different operating conditions such as amounts of activated carbon (g), treatment temperatures (°C) and stirring time (minutes). Results showed that these operating parameters influence the removal of sulphur compounds from diesel oil. The maximum desulphurisation obtained was 76.16%.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Gdyni; 2018, 106; 41-47
1644-1818
2451-2486
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Gdyni
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Modification of activated carbons for application in adsorption cooling systems
Autorzy:: Wolak, Eliza
Vogt, Elżbieta
Szczurowski, Jakub
Powiązania:: https://bibliotekanauki.pl/articles/298146.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: activated carbon
hydrophobization
modification
heat of wetting
Opis:: In this paper commercially available activated WD-extra carbon (Gryfskand) which is applied for water treatment was used. Activated carbon was modified by the following chemical agents: H2O2, HNO3 and HCl. Chemical modifications significantly affect the chemical, structural and surface properties of activated carbons. Hydrophobization with ethereal stearic acid was performed on the raw material and samples after chemical modification. Hydrophobic properties of the samples were specified. The relationship of the chemical modification agents with hydrophobization degree was indicated. The thermal effects of wetting by methanol was measured. The heat of wetting was calculated. The purpose of the work was to modify the WD carbon properties to obtain an adsorbent for cooling systems characterized by both good thermal capacity and moisture resistance. The modifying chemical substances applied accounted for an increase in the concentration of the acid functional groups. The hydrophobized and HCl-modified WD(HCl) carbon has the best hydrophobized properties. The results of studies describing such modifications allow to conclude that the use of hydrophobic materials may lead to the production of sorbents with new functions facilitating their storage and use.
Źródło:: Technical Sciences / University of Warmia and Mazury in Olsztyn; 2019, 22(1); 87-98
1505-4675
2083-4527
Pojawia się w:: Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Modeling of the carbon in pulp (cip) process in gold cyanide leaching plants using the plant data
Autorzy:: Sayiner, B.
Powiązania:: https://bibliotekanauki.pl/articles/110084.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: modeling
cyanide leaching
activated carbon
adsorption
gold
Opis:: An improved method to model CIP plants by plant data is presented. The Turkish gold cyanide leaching CIP plants, Bergama Ovacik, Gumushane Mastra and Eskisehir Kaymaz were modeled by using gold concentrations of monthly carbon, solution and solids spot samples of adsorption tanks without a need of laboratory work. Five carbon adsorption models were used namely k-n, Nicol-Fleming, Dixon, Film Diffusion with Langmuir isotherm and Film Diffusion with Freundlich isotherm (Johns model). Several monthly obtained plant data were collected and modeled separately and model parameters as well as regression coefficient R2 values were found by non-linear regression. By comparing R2 values, the best fit model for the three CIP plants was determined as Film Diffusion with Langmuir Isotherm that R2 values were above 0.95. Thus, by using the best fit model, the Kaymaz plant was optimized for existing 49 Mg per hour ore feed tonnage and plant parameters were predicted according to planned feed tonnage increase to 120 Mg per hour.
Źródło:: Physicochemical Problems of Mineral Processing; 2014, 50, 2; 841-852
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Improving the carbon dioxide uptake efficiency of activated carbons using a secondary activation with potassium hydroxide
Autorzy:: Zgrzebnicki, M.
Michalczyszyn, E.
Wrobel, R. J.
Powiązania:: https://bibliotekanauki.pl/articles/778515.pdf
Data publikacji:: 2018
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: activated carbon
activation
pore size distribution
DFT
Opis:: Secondary activation of commercial activated carbon (AC) ORGANOSORB 10-CO was carried out at 600, 700 and 800°C with mass ratios of potassium to AC (K/AC) in range 1–3. Crucial samples have shown following CO₂ uptakes and SSA – 3.90 mmol/g and 1225 m²/g, 4.54 mmol/g and 1546 m²/g, 4.28 and 1717 m²/g for pristine material and samples obtained at 700°C with K/AC = 2 and at 800°C with K/AC = 3 respectively. Last sample also indicated significant mesopore volume increase in diameter range 2–5 nm, from 0.11 to 0.24 cm3/g. CO₂ uptake increase was explained by formation of micropores up to diameter of 0.8 nm, which distribution was established from CO₂ sorption using DFT. Surface chemistry of all samples has not changed during modification, what was proven by XPS. Moreover, deeper incorporation of potassium ions into graphite at higher temperatures was observed as confirmed with EDS, XPS and XRD.
Źródło:: Polish Journal of Chemical Technology; 2018, 20, 3; 87-94
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Activated carbons prepared from hazelnut shells, walnut shells and peanut shells for high CO2 adsorption
Autorzy:: Lewicka, K.
Powiązania:: https://bibliotekanauki.pl/articles/778748.pdf
Data publikacji:: 2017
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: activated carbon
biomass
nutshells
CO2 adsorption
Opis:: Research treats about producing activated carbons for CO₂ capture from hazelnut shells (HN), walnut shells (WN) and peanut shells (PN). Saturated solution of KOH was used as an activating agent in ratio 1:1. Samples were carbonized in the furnace in the range of temperatures 600°C–900°C. Properties of carbons were tested by N2 adsorption method, using BET equation, DFT method and volumetric CO₂ adsorption method. With the increase of carbonization temperature specific surface area of studied samples increased. The largest surface area was calculated for samples carbonized at 900°C and the highest values of CO₂ adsorption had samples: PN900 at 0°C (5.5 mmol/g) and WN900 at 25°C (4.34 mmol/g). All of the samples had a well-developed microporous structure.
Źródło:: Polish Journal of Chemical Technology; 2017, 19, 2; 38-43
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:: The Effect of Ozonation, Coagulation and Adsorption on Natural Organic Matter Removal
Autorzy:: Dąbrowska, Lidia
Powiązania:: https://bibliotekanauki.pl/articles/1955547.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ozone
activated carbon
polyaluminium chloride
trihalomethane precursor
Opis:: For the treatment of surface water, the coagulation process was used with highly alkaline polyaluminium chloride PAX-XL19F and coagulation supported by ozonation and adsorption on powdered activated carbon CWZ-30 for reducing the level of surface water pollution with organic substances. In addition to the typical indices used to assess the content of organic compounds (total organic carbon TOC, oxidisability OXI, ultraviolet absorbance UV254), the study also evaluated colour, turbidity, and the potential of trihalomethanes formation THM-PF. Reduction in the content of TOC in water after coagulation ranged from 22 to 24%, OXI in the range of 34-36%, and UV254 absorbance from 52-55%. The turbidity and colour of the water was reduced by 70-73% and 56-60%, respectively. The use of preliminary ozonation and activated carbon-assisted coagulation increased the efficiency of water treatment. Changes in the values of TOC, OXI, UV254 absorbance, turbidity and colour were 28-33%, 45-46%, 69-73%, 72-79% and 89-100%, respectively. In the water purified by coagulation and then chlorinated, THM-PF was 37-38% lower than in untreated surface water. The use of additional pre-ozonation and activated carbon during coagulation increased the reduction of THM-PF by 9-12%.
Źródło:: Journal of Ecological Engineering; 2021, 22, 9; 216-223
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:: Improved recovery of gold and silver from thiosulfate solution on activated carbon in presence of ammonium persulfate
Autorzy:: Mahmoud, Mohamed H. H.
Awad, Hesham M.
Powiązania:: https://bibliotekanauki.pl/articles/110611.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: activated carbon
adsorption
gold
silver
thiosulfate
ammonium persulfate
Opis:: Thiosulfate (TS) process for extraction of gold and silver is a promising alternative to the highly toxic cyanidation process. One of the main reasons caused limiting the practical application of the TS process is the poor recovery of gold and silver on the commonly used activated carbon (AC). Increasing amounts of TS ions greatly inhibited the adsorption of gold and silver from synthetic solutions. No adsorption was obtained when the TS concentration reached 0.8 M after 5 h. The adsorption efficiency from real leach liquor initially contained 0.2 M TS was as low as 40-50%, after a long time of 15 hours. We have suggested that the removal of the residual TS ions in leach liquor through an interaction with an oxidizing agent such as ammonium persulfate (APS) would improve the adsorption of gold and silver on AC. Increasing the APS concentrations from 0.0 M to 0.01 M drastically improved the gold adsorption efficiency from 5% to 85% after only 10 min. Almost 95% of both metals was adsorbed after 90 min. EDXRF chart confirmed the adsorption of gold and silver on AC. A process flowsheet was proposed for an integrated TS leaching and recovery of gold and silver from Al Amar tailing including adsorption on AC in presence of APS.
Źródło:: Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1271-1285
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 18.

Tytuł:: Characteristics and Adsorption Test of Activated Carbon from Indonesian Bituminous Coal
Autorzy:: Kusdarini, Esthi
Budianto, Agus
Powiązania:: https://bibliotekanauki.pl/articles/2202119.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ammonium phosphate
coal
batik waste
activated carbon
chromium
Opis:: The fast-growing batik industry in Indonesia raises the problem of the waste containing chromium. One method to remove chromium is by the adsorption process using activated carbon. Activated carbon can be made from coal. This commodity is a mining mineral the availability of which is still abundant in Indonesia. This study aimed to obtain: 1) the best concentration of activator and activation temperature in the manufacture of activated carbon; 2) characteristics of activated carbon (moisture content, volatile matter content, ash content, fixed carbon content, iodine number, specific surface area, pore-volume, pore surface area, pore radius, and SEM photos); 3) % activated carbon removal for chromium and maximum adsorption capacity for chromium; 4) Freundlich and Langmuir isotherm adsorption equation of activated carbon to chromium. The manufacture of activated carbon was carried out by a carbonization process followed by a chemical and physical activation processes. The chemical activator was ammonium phosphate with doses of 74.5 g/L, 149 g/L, 223.5 g/L, and 298 g/L. Meanwhile, physical activation was carried out at 848 K, 948 K, 1048 K, and 1148 K. The next step was to test the adsorption capacity of activated carbon on artificial batik waste containing chromium. The results showed that: 1) activator concentration did not significantly affect the characteristics of activated carbon. Meanwhile, the optimal activation temperature is at a temperature of 1048 K and 1148 K, which can produce the activated carbon that meets the requirements of activated carbon of the Indonesian National Standard 06-3730-1995 with the following contents: air content 0.16–0.81%; volatile matter 14.62–19.31%; ash 6.48–9.97%; fixed carbon 70.60–75.79%; iodine number 1243.13–1258.65%; specific surface area 31.930 m2/g; activated carbon pore volume 0.011 cc/g; pore surface area 8.905 m2/g; activated carbon pore radius 30.614; 3) the proportion of activated carbon removal for chromium is 37–53% and the maximum adsorption capacity for chromium is 52 mg/g; 4) the Freundlich equation test resulted in a constant R2 of 0.5126, n 2.4870, KF 8.8818 mg/g, while the Langmuir equation test resulted in a constant R2 of 0.8897, b -0.0075 L/mg, qm -90.0901 mg/g.
Źródło:: Journal of Ecological Engineering; 2022, 23, 10; 129--138
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:: Wastewater Treatment Using Activated Carbon Produced from Oil Shale
Autorzy:: Hamdan, Mohmmad Ahmad
Sublaban, Esraa Taha
Al-Asfar, Jamil Jawdat
Banisaid, Mai Abdullah
Powiązania:: https://bibliotekanauki.pl/articles/2202355.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: activated carbon
wastewater treatment
removing
heavy metal
water
Opis:: In recent years, many researchers have expressed interest in wastewater treatment using activated carbon produced from cheap raw materials. In this work, an activated carbo-aluminosilicate (ACS) – supported zero-valent iron (ZVI) composite was produced from Um AL-Rasa oil shale mine and examined to eliminate Chromium (VI) from contaminated water. Activation of raw oil shale fine particles (< 212 μm) was chemically performed using 95 and 5% wt of H2SO4 and HNO3, respectively, as activating agents. The activated material was further treated with caustic soda, named ACS, and modified with fine zero-valent iron particles < 212 μm), called ZVI/ACS composite. Kaolin was added to the composite with the ratio: (50 % wt. light kaolin: 50 % wt. ACS), named as ZVI/ACS/K. The XRD analysis for both composites confirmed iron dispersion at 45°. Adsorption experiments were carried out using the two adsorbents ZVI/ACS & ZVI/ACS/K under different values of pH, and adsorbent dosage. The results indicated that the reduction of Chromium was maximum under the 3 pH value and 2.0 gm amount of ZVI/ACS/K. Furthermore, it was found the removal rate was enhanced by 17% and 24.7% when ZVI/ACS & ZVI/ACS/K adsorbents were used, respectively, compared to that when only ACS adsorbent was used alone. Finally, the dependency of Chromium removal on its initial concentration by ZVI/ACS/K adsorbent was also investigated at two different temperatures of 27° and 50°. The results indicated a decrease in the removal rate of the Chromium as the concentration increased at 27°; however, the removal rate previously enhanced at 50° at all initial concentrations.
Źródło:: Journal of Ecological Engineering; 2023, 24, 2; 131--139
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 20.

Tytuł:: Polyurethane Loaded with Vegetable Activated Carbon for Heavy Metals Removal from Water
Autorzy:: El Malti, Wassim
Hamieh, Mostafa
Noaman, Amer
El-Dine, Rim Nasser
Hijazi, Akram
Al-Khatib, Wassef
Powiązania:: https://bibliotekanauki.pl/articles/1955582.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: activated carbon
adsorption
banana stem
heavy metals
polyurethane
Opis:: The heavy metals pollutants resulting from industrial wastewater are a major environmental problem due to their toxicity and non-biodegradability. Their removal became a trending environmental subject. The preparation of low-cost and eco-friendly adsorbents for industrial wastewater treatment has been widely investigated. Furthermore, the use of polymeric material for this purpose is highly increasing. In this study, banana stem agro-waste was valorized by preparing and characterizing its derived activated carbon used as a filler to improve the adsorption performance of polyurethane foams. The loaded polyurethane was synthesized in the shape of pellets, characterized by SEM, and tested in removing Pb2+ and Cu2+ from aqueous solutions. The effects of activated carbon filler concentration, number of filtering passes, and pH were examined. The loaded polyurethane demonstrated a good adsorption capacity that was enormously improved compared to the unloaded polymer. 77% Pb2+ and 40% Cu2+ removal were reached after one filtering pass only. The optimum pH was determined to be 4. After the 10th pass, and at any pH, almost 100% of the studied metals were eliminated. Rapid and straightforward selectivity and seawater deionization tests were carried out and confirmed the capacity performance of the prepared pellets in removing different aqueous ions.
Źródło:: Journal of Ecological Engineering; 2021, 22, 9; 99-110
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 21.

Tytuł:: Calcium alginate/activated carbon/humic acid tri-system porous fi bers for removing tetracycline from aqueous solution
Autorzy:: Sun, Qinye
Zheng, Heng
Li, Yanhui
Li, Meixiu
Du, Qiuju
Wang, Cuiping
Sui, Kunyan
Li, Hongliang
Xia, Yanzhi
Powiązania:: https://bibliotekanauki.pl/articles/949364.pdf
Data publikacji:: 2020
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: Sodium alginate
Humic acid
Activated carbon
Adsorption
Tetracycline
Opis:: In this study, activated carbon and humic acid powder were fixed by the cross-linking reaction of sodium alginate. Calcium alginate/activated carbon/humic acid (CAH) tri-system porous fibers were prepared by the wet spinning method and freeze-dried for the removal of tetracycline in aqueous solution. Subsequently, the morphology and structure of CAH fibers were measured by scanning electron microscopy (SEM) and the Brunauer-Emmett-Teller (BET) method. The effect of pH, contact time, temperature and other factors on adsorption behavior were analyzed. The Langmuir and Freundlich isotherm models were used to fit tetracycline adsorption equilibrium data. The dynamics data were evaluated by the pseudo-second-order model, the pseudo-second-order model and the intraparticle diffusion model. Thermodynamic study confirmed that the adsorption of tetracycline on CAH fibers was a spontaneous process.
Źródło:: Polish Journal of Chemical Technology; 2020, 22, 3; 9-16
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:: Modeling of experimental data for the adsorption of methyl orange from aqueous solution using a low cost activated carbon prepared from Prosopis juliflora
Autorzy:: Kumar, M.
Tamilarasan, R.
Powiązania:: https://bibliotekanauki.pl/articles/778002.pdf
Data publikacji:: 2013
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: activated carbon
adsorption
isotherm
kinetics and methyl orange
Opis:: This paper presents the feasibility for the removal of methyl orange (MO) dye from aqueous solution using an activated carbon prepared from Prosopis juliflora bark. Batch adsorption experiments were carried out as a function of pH, contact time, adsorbate concentration, adsorbent dosage and temperature. The commonly applicable isotherms namely Freundlich and Langmuir equations are used for the prediction of isotherm parameters. A comparison of linear least-square method and a trial-and-error non-linear method are examined in Freundlich and Langmuir (Four forms) isotherms. The nature of adsorption isotherm feasibility was evaluated with dimensionless separation factors (RL). The dynamics of adsorption process was analyzed with Lagergren’s Pseudo-first order and Pseudo-second order kinetic equations. Thermodynamic parameters like the change in enthalpy (ΔHo), change in entropy (ΔSo) and change in Gibbs free energy (ΔGo) were evaluated and ΔGo shows a negative value whereas ΔHo shows the positive value indicating that the adsorption process was spontaneous and endothermic in nature. The functional group characterization of the adsorbent was done using Fourier transform infrared spectroscopy (FTIR). The thermal stability of activated carbon was analyzed using Thermo gravimetric analysis (TGA) and Differential thermal analysis (DTA).
Źródło:: Polish Journal of Chemical Technology; 2013, 15, 2; 29-39
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:: Adsorpcja z roztworów wodnych różnych form chromu
Adsorptions from Water Solutions Differents Forms of Chromium on the Five Activated Carbons
Autorzy:: Lach, J.
Powiązania:: https://bibliotekanauki.pl/articles/297207.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: adsorpcja
węgle aktywne
chrom
adsorption
activated carbon
chromium
Opis:: Tematem badań była ocena skuteczności adsorpcji chromu(III) oraz chromu(VI) z roztworów jednoskładnikowych oraz dwuskładnikowych, w których występują one równocześnie. Badania adsorpcji prowadzono z roztworów o pH 6, w których Cr(III) przyjmuje formy Cr(OH)2+ i Cr(OH)+2 , a Cr(VI) HCrO-4 i CrO2-4. Jony Cr(III) i Cr(VI) są więc w czasie adsorpcji niekonkurencyjne, ponieważ zajmują inne miejsca aktywne na powierzchni sorbentów. Istnieje jednak możliwość blokowania porów, a tym samym dostępu do miejsc aktywnych. W badaniach przeanalizowano wielkość adsorpcji Cr(III) i Cr(VI) z roztworów jednoskładnikowych oraz Cr(VI) z roztworów dwuskładnikowych na pięciu węglach aktywnych stosowanych w stacjach uzdatniania wody: F-100, F-300, WG-12, Picabiol, ROW 08 Supra. W większości przypadków (z wyjątkiem węgla WG-12) sorpcja kationów Cr(III) była większa niż anionów Cr(VI). Obecność w roztworze obok anionów Cr(VI) kationów Cr(III) wpłynęła pozytywnie na efekty adsorpcji. Uszeregowano badane węgle aktywne ze względu na wielkość adsorpcji kationów Cr(III) i Cr(VI) w stosunku do wielkości powierzchni właściwej i ilości ugrupowań kwasowo-zasadowych. Ustalono, że decydująca jest budowa chemiczna powierzchni węgla, a nie jego powierzchnia właściwa.
The topic of research was assessment of the effectiveness adsorptions of chromium (III) and chromium(IV) from monocomponents and binary solutions in which they are at the same time. The research was conducted from solutions the pH = 6 in which Cr(II) has forms Cr(OH)2+ and + 2 Cr(OH) , Cr(VI) has forms − 4 HCrO and 2 4 CrO . Ions Cr(III) and Cr(VI) during the process of adsorptions are noncompetitive because they have different active locations on sorbents area. However there is possibility to block the porous thus access to active locations. In the research analysed amount of adsorptions Cr(III) and Cr(VI) from monocomponents solutions and Cr(VI) with policomponents solutions on the five activated carbons use in water treatment plant: F-100, F-300, WG-12, Picabiol, ROW 08 Supra. The most of cases (except for carbon WG-12) the sorptions of cations Cr(III) was larger quantity than anions Cr(VI). Presences in solutions next to anions Cr(VI) cations Cr(III) have a positive impact on adsorption effects.
Źródło:: Inżynieria i Ochrona Środowiska; 2013, 16, 3; 397-403
1505-3695
2391-7253
Pojawia się w:: Inżynieria i Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 24.

Tytuł:: Efficient removal of imidacloprid pesticide by two eco-friendly activated carbons
Autorzy:: Mohammad, Somaia Gaber
El-Refaey, Ahmed A.
Powiązania:: https://bibliotekanauki.pl/articles/27312663.pdf
Data publikacji:: 2023
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: activated carbon
hazelnut
imidacloprid
pesticide
regeneration
removal
walnut
Opis:: In this study, the removal of imidacloprid (IMD) pesticide onto activated carbon produced from nut shells of hazelnut (HAC), and walnut (WAC) has been investigated. The prepared activated carbons were characterised by total carbon, nitrogen and hydrogen content, surface areas and pore volume. Fourier-transform infrared (FTIR), and scanning electron microscopy (SEM) were studied before and after adsorption experiments. Effects of adsorbent dose (0.02-0.2 g), contact time (10-120 min), initial imidacloprid concentration (10-100 mg∙dm-3), and pH (1-8), and temperatures (25-50°C) on the removal of IMD pesticide by HAC and WAC in the batch mode were studied. The removal percentage of imidacloprid pesticide by HAC and WAC was 93.79% and 94.72%, respectively. The study showed that the pseudo-second-order kinetics model fitted well for both activated carbons. Moreover, adsorption isotherm results were evaluated using Freundlich, Langmuir and Temkin isotherm models. The adsorption results correlated well with the Langmuir isotherm model (R2 = 0.987 and 0.964) with maximum adsorption capacities of 76.923 and 83.333 mg∙g-1 for HAC and WAC, respectively, and an equilibrium time within 120 min. The nature of the adsorption of imidacloprid pesticide onto HAC and WAC is exothermic, spontaneous and physical in nature. The two prepared activated carbons (HAC, WAC) were successfully regenerated for three cycles and could be used as an effective and low-cost adsorbent for the removal of IMD pesticide from aqueous solutions. The production of the activated carbons of HAC and WAC will provide minimisation of these wastes in the environment.
Źródło:: Journal of Water and Land Development; 2023, 57; 220--230
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:: Adsorption behaviour of polar solvent and water vapours on Sorbonorit B4 activated carbon
Autorzy:: Downarowicz, Dorota
Gabruś, Elżbieta
Powiązania:: https://bibliotekanauki.pl/articles/27315673.pdf
Data publikacji:: 2023
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: adsorption
activated carbon
isotherms
isosteric heat
column studies
Opis:: In this work, the affinity of the heterogeneous Sorbonorit B4 (SB4) activated carbon toward methyl ethyl ketone (MEK), isopropyl alcohol (IPA), n-propyl alcohol (NPA) and isobutyl alcohol (IBA), and water vapours was examined. Adsorption equilibrium measurements demonstrate a higher adsorption capacity of water vapour than organic compounds at relative pressures above 0.4. The adsorption capacities of SB4 at the same vapor pressure followed the order: NPA> IPA> MEK> IBA. The Langmuir, Dubinin-Radushkevich, Dubinin-Astakhov, and Toth isotherm models were chosen to describe experimental results. Based on the multi-temperature isotherms, the values of the isosteric heat of adsorption were determined for various adsorbate loading. The results indicate a strong influence of VOC molecule structures and the surface heterogeneity of SB4 on the adsorption efficiency. For IPA-SB4 pair, the maximum temperature rise in a fixed-bed bed in the adsorption process and the energy requirement for regeneration were calculated and experimentally verified.
Źródło:: Polish Journal of Chemical Technology; 2023, 25, 4; 28--35
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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